Bleeding or spotting

Hi mga mommies out there is it normal to bleed jn 12 weeks? No pain, may naramdaman kasi akong parang luquid pwro hnd naman po madami then pinunasan kopo ng tissue and may nakita akong blood but not totally red may pagka brown then nag stop. After an hour meron ulit then nag stop ulit then nung kumilos ako meron nanaman pero now wala na btw im a working mom. I alread had a miscarriage before